9-芴甲醇 、
3'-azido-3'-deoxy-thymidine-5'-carboxylic acid 在
吡啶 、 1-(2,4,6-triisopropylbenzenesulfonyl)-3-nitro-1,2,4-triazole 作用下,
反应 0.5h,
以95%的产率得到(2S,3S,5R)-3-Azido-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-carboxylic acid 9H-fluoren-9-ylmethyl ester